# Documentation

### This is machine translation

Translated by
Mouse over text to see original. Click the button below to return to the English verison of the page.

# asecd

Inverse secant in degrees

## Syntax

• ``Y = asecd(X)``
example

## Description

example

````Y = asecd(X)` returns the inverse secant (sec-1) of the elements of `X` in degrees. The function's domain and range include complex values. For real elements of `X` in the domain [-Inf,1] and [1,Inf], `asecd` returns values in the range [0, 180]. For values of `X` outside this range, `asecd` returns complex values.```

## Examples

collapse all

```x = [10 1 Inf]; y = asecd(x) ```
```y = 84.2608 0 90.0000 ```

The `asecd` operation is element-wise when you pass a vector, matrix, or N-D array.

```asecd(1+i) ```
```ans = 64.0864 +30.4033i ```

## Input Arguments

collapse all

Secant of angle, specified as a real-valued or complex-valued scalar, vector, matrix, or N-D array. The `asecd` operation is element-wise when `X` is non-scalar.

Data Types: `single` | `double`
Complex Number Support: Yes

## Output Arguments

collapse all

Angle in degrees, returned as a real-valued or complex-valued scalar, vector, matrix, or N-D array of the same size as `X`.

## More About

collapse all

### Tall Array Support

This function fully supports tall arrays. For more information, see Tall Arrays.

## See Also

#### Introduced before R2006a

Was this topic helpful?

Watch now